At the moment the layout of the style inspector's rule view is not optimal. I made a few simple tweaks when working on another bug. If we have a patch that is better than the current implementation we should land it.
Of course, when bug 712469 is complete we will be able to use that ... this is more of a 5 minute step in the right direction.

yeah, this was a little weird for me during playtesting, but overall I think the improvements are "better" overall. Really long selectors can get a little funky in a tiny sidebar. Maybe change the min-width on the sidebar to force more space? Maybe start hiding filenames if below a certain threshold?

Created attachment 593065[details][diff][review]
Only hide checkboxes
We decided against moving the filenames to the right because of text mangling.
This is just a simple patch to hide the checkboxes ... Dão has already checked it.